It could show signs that may be related to previous damage of heart muscle. Damage of heart muscle can cause arrhythmia. Most arrhythmias, unless left uncontrolled for long periods of time do dot cause heart damage.
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Although it theoretically makes sense to use anti arrhythmic medications which target the parasympathetic (vagal) nervous system, studies don't seem to show a difference in success using this approach.

Although not curative, an av node ablation in combination with a pacemaker or defibrillator can usually eliminate the symptoms of atrial fibrillation. If you have obstructive sleep apnea using CPAP can greatly improve atrial fibrillation.
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Usually these are extra beats from the upper or lower chambers of the heart.

However, this symptom could represent other heart rhythm abnormalities. If the heart is otherwise normal they are usually benign. A holter monitor or event recorder can help capture your heart rhythm during symptoms to precisely determine the cause of palpitations.
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